I am trying to supplement N360 with add'l malware detection tools. Having downloaded one such ... Spybot ... I was pleased that it found a trojan not detected by N360.
However, my Win8.1 PC has now suddenly degraded in performance ... dramatically ... e.g. a Win Explorer navigation click results in "Not responding" ... so are these two programs "fighting each other," and viewing the other as a problem?
I am now terrified that, in trying to search for trouble using this new freeware tool (downloaded from CNET) that I've inadvertently brought malware onto my PC and worsened things.
I did do a full N360 system scan just now .... and got a green light no threats found ... but empirical evidence strongly suggests otherwise.